News
Welcome to the News community!
Rules:
1. Be civil
Attack the argument, not the person. No racism/sexism/bigotry. Good faith argumentation only. This includes accusing another user of being a bot or paid actor. Trolling is uncivil and is grounds for removal and/or a community ban. Do not respond to rule-breaking content; report it and move on.
2. All posts should contain a source (url) that is as reliable and unbiased as possible and must only contain one link.
Obvious right or left wing sources will be removed at the mods discretion. We have an actively updated blocklist, which you can see here: https://lemmy.world/post/2246130 if you feel like any website is missing, contact the mods. Supporting links can be added in comments or posted seperately but not to the post body.
3. No bots, spam or self-promotion.
Only approved bots, which follow the guidelines for bots set by the instance, are allowed.
4. Post titles should be the same as the article used as source.
Posts which titles don’t match the source won’t be removed, but the autoMod will notify you, and if your title misrepresents the original article, the post will be deleted. If the site changed their headline, the bot might still contact you, just ignore it, we won’t delete your post.
5. Only recent news is allowed.
Posts must be news from the most recent 30 days.
6. All posts must be news articles.
No opinion pieces, Listicles, editorials or celebrity gossip is allowed. All posts will be judged on a case-by-case basis.
7. No duplicate posts.
If a source you used was already posted by someone else, the autoMod will leave a message. Please remove your post if the autoMod is correct. If the post that matches your post is very old, we refer you to rule 5.
8. Misinformation is prohibited.
Misinformation / propaganda is strictly prohibited. Any comment or post containing or linking to misinformation will be removed. If you feel that your post has been removed in error, credible sources must be provided.
9. No link shorteners.
The auto mod will contact you if a link shortener is detected, please delete your post if they are right.
10. Don't copy entire article in your post body
For copyright reasons, you are not allowed to copy an entire article into your post body. This is an instance wide rule, that is strictly enforced in this community.
view the rest of the comments
The issue isn't really comparing high noon to midnight. The issue is comparing prices at either high noon (when supply is large) or midnight (when demand is small) to the space in between, especially dinnertime (when demand peaks just as solar supply finishes tailing off). There are ways to move some of that peak into noon (e.g: if homes are well insulated, they can be cooled or heated while solar is still up and used as a thermal battery to at least bridge over to the nighttime hours), but some of the peak is much harder to shift around. If everybody starts cooking and turns on the television around dinnertime, the only way to distribute that is to stagger dinnertime, which is easier said than done for a lot of people's schedules. Having power storage to bridge that gap (wouldn't it be nice if everyone that has an electric car got home and used whatever range they had leftover in their battery to absorb their extra demand and then start charging again at nighttime rather than immediately start charging at the worst time of day. Or having solar plants that store excess daytime power in thermal, hydro, or chemical batteries to discharge and increase supply later) is likely easier than convincing enough people to work odd shifts or delay their after work leisure activities
It would not be nice to power my house with my car. It's extra wear on the battery, which is basically half the cost of an electric car. It opens me up to potential issues if I need to leave in the evening, my car now has reduced range.
Low power cycling (and powering a house is miniscule draw for a car) below 80% SOC cannot induce enough wear on a car battery to show up at all before calendar aging makes the battery unusable (which is about 10 years after the rest of the car has worn out on average). And the range it reduces is about 10% for an evening of powering a house, leaving more range than the typical ICE has when it is parked with the tank less than half full.
As to the investment. A tesla 3 is $40k and has an 86kWh battery in it (82kWh usable). Modern LFP batteries are rated for 8000 cycles at 0.1C (8kW or about what you can squeeze through a reasonable-sized wire at 240V ). If you somehow manage to wear it out and got 8c/kWh, you've made a profit. At 30c/kWh spread that some people pay, that's tripling your investment.
You can only 50% drain your battery during peak 5-9pm consumption though so this will take 22 years of going full-tilt every day. The other 1.5 cars in each average household won't get a turn, nor will several of your neighbors because peak electricity consumption is under 8kW per capita pretty much everywhere.
If you are lucky enough to wear out your battery this way, it will pay somewhere between 50% and 300% of the TCO of your car depending on where you live. 5% isn't a great investment, but it also comes with a free car (and currently up to $8k ofnsubsidies not counted above).
Powering a couple appliances for a few hours is nothing for a car battery, those things are huge and powerful because cars are so inefficient. That's not to say that V2G or V2X will work perfectly for everybody, but with the average commute around 25 miles and plenty of EVs out there over 200 mile range (which equates to mutliple days of typical electrical usage), there's certainly some extra capacity. If you were compensated for the power you sold back at peak times, it could help justify paying for and lugging around the kind of battery capacity that is specced for your weekend/holiday road trips just to make your likely shorter daily commute. I'm using you generically, I don't know your specific situation, so you certainly could be someone who would not feel a need to engage in that kind of scheme
If that's the case or becomes the case, isn't it easily solvable since the batteries only need to store the energy for a few hours? Maybe some spinning wheel thing?
It is a very solvable problem, and mechanical or thermal batteries are likely to be at least part of the solution. Of the three kinds of gaps/shortfalls that grid storage would have to cover, the milliseconds-long and hours-long gaps are probably the easiest to solve. The days-long gaps (stretches of cloudy days, low winds for extended periods) is probably the most expensive to solve, but even those are not really that difficult (hydro storage is a tested technology that works well and HVDC transmission linking regions together can allow local shortfalls to be covered by remote surpluses). It's all more a matter of building capacity than needing new technology to solve an unsolvable problem, from what I understand
Longevity is the big problem. Every practical method of energy storage I can think of is negatively impacted by frequent charge discharge cycles. Even a flywheel like you suggest would eventually need new bearings, need rebalancing, etc....